Overview

1. Generate Private Public Key Pair Mac And Cheese
2. What Is Public Key
3. Generating Public/private Rsa Key Pair Mac
4. Generate Private Public Key Pair Mac Keyboard

To use SSH keys on IU Sitehosting, follow the instructions for your OS.

To generate private (d,n) key using openssl you can use the following command: openssl genrsa -out private.pem 1024 To generate public (e,n) key from the private key using openssl you can use the following command: openssl rsa -in private.pem -out public.pem -pubout. Jun 17, 2014 In the following article, we’re going to run through the process of creating a public/private SSH key-pair in OS X 10.9. Once this is done, we’ll configure our GitHub account to use the public key, create a new repository and finally pull this repository down onto our machine via SSH.

Generate SSH keys on Linux/Mac

1. Generate a public/private key pair:
   1. Log in to the computer you will use to access Sitehost, and then use the command line to generate a key pair. To generate RSA keys, on the command line, enter:
   2. You will be prompted to supply a filename (for saving the key pair) and a passphrase (for protecting your private key):
      • Filename: To accept the default filename and location for your key pair, press Enter or Return without entering a filename. Alternatively, you can enter a filename (for example, my_ssh_key) at the prompt, and then press Enter or Return.
      • Passphrase: Enter a passphrase that contains at least five characters, and then press Enter or Return. If you press Enter or Return without entering a passphrase, your private key will be generated without password protection.
2. Once the key pair has been generated, navigate to the location where you saved the public key.
3. Copy the contents of your public key (this is the file with the .pub extension).
4. Once you copy the contents of your public key, see Add a public key to IU Sitehosting below.

Generate SSH keys on Windows

1. Install PuTTY. The PuTTY command-line SSH client, the PuTTYgen key generation utility, the Pageant SSH authentication agent, and the PuTTY SCP and SFTP utilities are packaged together in a Windows installer available under The MIT License for free download from the PuTTY development team.
2. Launch PuTTYgen.
3. In the 'PuTTY Key Generator' window, under 'Parameters':
   • For 'Type of key to generate', select RSA. (In older versions of PuTTYgen, select SSH2-RSA.)
   • For 'Number of bits in a generated key', leave the default value (2048).
4. Under 'Actions', click Generate.
5. When prompted, use your mouse (or trackpad) to move your cursor around the blank area under 'Key'; this generates randomness that PuTTYgen uses to generate your key pair.
6. When your key pair is generated, PuTTYgen displays the public key in the area under 'Key'. In the 'Key passphrase' and 'Confirm passphrase' text boxes, enter a passphrase to passphrase-protect your private key.
   If you don't passphrase-protect your private key, anyone with access to your computer will be able to SSH (without being prompted for a passphrase) to your account on any remote system that has the corresponding public key.
7. Right-click in the 'Public key for pasting into OpenSSH authorized_keys file' text box, choose Select All, and then right-click in the text box again and select Copy.
8. Save your private key in a safe place. You'll use the passphrase any time you log into a Sitehost server using SSH keys, and you'll need to copy the public key to your profile on the WebTech website. To save your private key:
   1. Under 'Actions', next to 'Save the generated key', click Save private key.
      If you didn't passphrase-protect your private key, the utility will ask whether you're sure you want to save it without a passphrase. Click Yes to proceed or No to go back and create a passphrase for your private key.
   2. Keep 'Save as type' set to PuTTY Private Key Files (*.ppk), give the file a name (for example, putty_private_key), select a location on your computer to store it, and then click Save.
   3. If you wish to connect to a remote desktop system such as Research Desktop (RED), click Conversions > Export OpenSSH key, give the file a name (for example, putty_rsa), select a location on your computer to store it, and then click Save.

If you no longer have the public key, or if it is later determined to be invalid, use the following steps to obtain a public key:

1. Launch PuTTYgen.
2. Click Load.
3. Navigate to your private key and click Open.
4. In the PuTTYgen pop-up window, enter the passphrase.
5. Right-click in the 'Public key for pasting into OpenSSH authorized_keys file' text box, choose Select All, and then right-click in the text box again and select Copy.
6. Select File > Exit to close PuTTYgen.

Add a public key to IU Sitehosting

1. Go to the IU Sitehosting account management.
2. At the top right, click Sign in, and, if prompted, log in with your IU username and passphrase.
3. At the top right, click your name. You'll be taken to the 'Manage your profile' page.
4. Under 'Manage SSH keys':
   1. In the 'Note' field, enter a short description.
   2. In the 'Public Key' field, paste the public key you copied in step 7 above.
5. Click Add. If the public key is valid, it will be added to your profile. Within 30 minutes, the public key will be added to all sitehost-test and sitehost accounts that you own, or for which you are a proxy or developer.

Connect to IU Sitehosting using SSH keys in various applications

This guide will demonstrate the steps required to encrypt and decrypt files using OpenSSL on Mac OS X. The working assumption is that by demonstrating how to encrypt a file with your own public key, you'll also be able to encrypt a file you plan to send to somebody else using their private key, though you may wish to use this approach to keep archived data safe from prying eyes.

Too Long, Didn't Read

Assuming you've already done the setup described later in this document, that id_rsa.pub.pcks8 is the public key you want to use, that id_rsa is the private key the recipient will use, and secret.txt is the data you want to transmit…

Encrypting

Decrypting

Using Passwords

OpenSSL makes it easy to encrypt/decrypt files using a passphrase. Unfortunately, pass phrases are usually 'terrible' and difficult to manage and distribute securely.

To Encrypt a File

You can add -base64 if you expect the context of the text may be subject to being 'visible' to people (e.g., you're printing the message on a pbulic forum). If you do, you'll need to add it to the decoding step as well. You can choose from several cypers but aes-256-cbc is reasonably fast, strong, and widely supported. Base64 will increase the size of the encrypted file by approximately 30%

To Decrypt a File

You will need to provide the same password used to encrypt the file. All that changes between the encrypt and decrypt phases is the input/output file and the addition of the -d flag. If you pass an incorrect password or cypher then an error will be displayed.

Encrypting Files Using your RSA keys

RSA encryption can only work with very short sections of data (e.g. an SHA1 hash of a file, or a password) and cannot be used to encrypt a large file. The solution is to generate a strong random password, use that password to encrypt the file with AES-256 in CBC mode (as above), then encrypt that password with a public RSA key. The encrypted password will only decrypt with a matching public key, and the encrypted file will require the unique password encrypted in the by the RSA key.

Replace OpenSSL

The copy of OpenSSL bundled with Mac OS X has several issues. Mac OS X 10.7 and earlier are not PCI compliant. It is best to replace it. See here for details: http://www.dctrwatson.com/2013/07/how-to-update-openssh-on-mac-os-x/

Generate Your Private/Public Key-pair

By default your private key will be stored in

• ~/.ssh/id_rsa : This is your private key and it must be kept secret
• ~/.ssh/id_rsa.pub : This is your public key, you can share it (for example) with servers as an authorized key for your account.You can change the location of where you store your keys, but this location is typical. Typically you want to ensure the private key is chmod 600, andd the public key is chmod 644.

Generate a PKCS8 Version of Your Public Key

The default format of id_rsa.pub isn't particularly friendly. If you are going to public your key (for example) on your website so that other people can verify the authorship of files attributed to you then you'll want to distribute it in another format. Generate digest with public key and rsa. I find it useful to keep a copy in my .ssh folder so I don't have to re-generate it, but you can store it anywhere you like.

Generate a One-Time-Use Password to Encrypt the File

The passwords used to encrypt files should be reasonably long 32+ characters, random, and never used twice. To do this we'll generate a random password which we will use to encrypt the file.

/windows-7-professional-key-generator-online.html. This will generate 192 bytes of random data which we will use as a key. If you think a person may need to view the contents of the key (e.g., they're going to display it on a terminal or copy/paste it between computers) then you should consider base-64 encoding it, however:

1. The password will become approximately 30% longer (and there is a limit to the length of data we can RSA-encrypt using your public key
2. The password will be 'padded' with '=' characters if it's not a multiple of 4 bytes.

Generate Private Public Key Pair Mac And Cheese

A Note on Long Passwords

There is a limit to the maximum length of a message that can be encrypted using RSA public key encryption. If you want to use very long keys then you'll have to split it into several short messages, encrypt them independently, and then concatinate them into a single long string. Decrypting the password will require reversing the technique: splitting the file into smaller chuncks, decrypting them independently, and then concatinating those into the original password key file.

Encrypt the File Using the Generated Key

adobe creative cloud 2019 download mac Now that you have a good random password, you can use that to AES encrypt a file as seen in the 'with passwords' section

Decrypting the file works the same way as the 'with passwords' section, except you'll have to pass the key.

Encrypt the Key Used to Encrypt the File

We used fast symetric encryption with a very strong password to encrypt the file to avoid limitations in how we can use asymetric encryption. Finally, we'll use asymetric encryption to encrypt the password. This solves the problem of 'how do I safely transmit the password for the encrypted file' problem. You can encrypt is using the recipients public key and they can decode it using their private key. Encrypt the password using a public key:

The recipient can decode the password using a matching private key:

Package the Encrypted File and Key

What Is Public Key

There are a number of ways to do this step, but typically you'll want just a single file you can send to the recipent to make transfer less of a pain. I'd recommend just making a tarball and delivering it through normal methods (email, sftp, dropbox, whatever). Though a secure method of exchange is obviously preferable, if you have to make the data public it should still be resistent to attempts to recover the information.

Generating Public/private Rsa Key Pair Mac

The file can be extracted in the usual way:

Generate Private Public Key Pair Mac Keyboard

You may want to securely delete the unecrypted keyfile as the recipient will be able to decode it using their private key and you already have the unencrypted data.